Electrical driving mechanism.



G. C. MARX. ELECTRICAL DRIVING MEGHANISM.

APPLICATION FILED APR. 23, 1906.

909,63 1 Patented Jan. 12, 1909.

51"/7'NESSES.'

STATES PATENT OFFICE. A GUSTAVE C. MARX, OF ELIZABETH, NEW JERSEY, ASSIGNORTO DIEHL MAYNUFAGTURINGv COMPANY, A CORPORATION OF NEW JERSEY. l

Specification of Letters Patent.

Patented Jan-12, 1eo9.

Application mea April 23, 190s. serial No. 313,167.

To all whom it may concern: 1.

Be it known that I, GUsTAvn C. MARX, a citizen of the United States, residingv at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Electrical Driving Mechanism, of which the following is a specification, reference being had therein to the accompanying drawings.

In the installation of driving mechanism involving a motor and a friction transmission device for operating small machines,

such as sewingmachines, lathes &c. involving the employment of a connecting belt, it has been customary heretofore to ship the motor' and transmission devices separately and to assemble them into operative relation by securing them independently to the table or frame of the machine to be driven. In certain devices of this character, such method of installation has involved the setting up of the component members in a defective alinement, and it is the, object of the present invention to insure the perfect assemblage of the parts by permanently securing them together before installation in connection with the machine to be driven.

In its preferred form the invention comprises a motor-frame provided with a footpiece by which it may be attached to a suitable support and carrying all of the operative members of the driving device, whereby the parts may be permanently assembled together for testing in the factory where they are constructed and shipped, as thus asfsembled, for practical operation under the same conditions.

The invention will be understood by a reference to the annexed drawings in which- Figure 1 is an elevation, partly in section of a driving device embodying the present improvement, and Fig. 2 a plan, also partly in section, representing the auxiliary bracket member of the motor-frame and the operating lever pivotally connected therewith.

The motor-frame 1 is provided at the top with a foot-piece 2 connected therewith by screws 3, the foot-piece being represented as secured to the under side of a supporting work-table by means of lag screws 4. The shaft 5 carrying the armature 6 is mounted in bearings 7 at` opposite sides of the frame 1, that at the left in Fig. 1 being provlded with a long bearing sleeve 8 secured removably thereto by means of a fastening screw 9. l. The extreme end of the armature shaft 5 is provided with a feather or spline 10 to whichy is ttedthe endwise-movable sleeve 11 having lateral arms 12'supporting the annular driving friction-clutch member 13 adapted for engagement with the usual yielding facing 14 of the recessed driven clutch member 15 formed upon one edge of the grooved pulley-wheel 16 having a hub 17 formed as a loose sleeve mounted to rotate freely upon the outer end of the fixed bearing sleeve 8.

Thebearing sleeve is represented as having a longitudinal oil-duct 18 upon its inner face which is connected with that portion of the exterior surrounded lby the loose sleeve 17 by the transverse openings 19.` The oil cup 20 is shown screwed into the upper side of the bearing sleeve 8 to serve as a common reservoir for supplying lubricant both to the armature shaft 5 and the loose sleeve 17.

The outer end of the sleeve 11'is provided with al wearing button 21 adapted to be engaged by the adjacent endof a bearing-screw 22 carried by the upright arm 23 of an operating lever fulcrumed upon a screw stud 25 carried by the outer end of a supporting bracket 26 and 'attached by screws 27 to the lower side of the motorframe 1, the longer laterally extending arm 24: of the operating lever having at its eX- treme end a treadle connection 28 by means of which it may be depressed to thrust the bearing screw 22 into operative engagement with the button 21 for forcing the driving member 13 of the clutch into operative relation with the driven member 15 to effect the rotation of the pulley wheel 16 and thereby produce the operation of the machine to be driven. In order to take the endwise thrust of the .sleeve 17, an anti-friction thrust-ring 29 of well known constructlon 1s interposed between the same and the bearing member 7.

As, represented herein, the operating lever is provided with a transverse notch 30 containing a block 31 of soft or yielding material such as leather, secured therein by means of split pins 32, and such block is normally maintained yieldin4 ly in frictional contact with the cylindrlcal rim of the driven clutch member 15 by means of a spring 33 interposed between a perforated ear 34.- upon the same and a screw stud 35 secured to the bearing hub 7 above the same.

The operation of the device is similar to that of others of the same class, the en agement of the brake-block 31 with the c utch membery 15 serving to prevent the rotation of f the pulle -wheel 16 until thetreadle-rod is depresse in op osition t theV spring 33,

' -when the brakelock 31 is withdrawn and A turethe bearing screw 22 brought into engagement with the button 21 to force the driving clutch member into engagement with the driven clutch 'member so as to induce the enagement of the pulley-wheel 16. The re-A ease of the treadle rod 28 permits the spring 33 to restore the initial relation of the parts. As in all drivin devices involving the emplolyment of an e ectric motor, the armas aft isfitted to its bearings for free .endwise movement, in order that the arma- A ture may accommodate itself to the ield and find the neutral point of the latter in which relation it operates most eiiiciently. 'It is therefore undesirable to fix the driving clutch member upon such shaft and force the same endwise into enga ment with the driven clutch member, ast is would serve t6 disturb to a morev or less degree the eicient relation of the armature with the field magnets fixed in the frame. For thesake vof compactness and convenience of control it is also desirable to ap ly at the end of the shaft the power require to force the clutch ymembers into operative relation. Thus bv a plying the driving clutch member with t e use of a spline to permit its endwise movement upon the shaft without relative rotatory motion thereon, I have been enabled to secure thedesired result in the simplest possiblev way, all parts of the mechanism being assembled together in a single frame, so that the device may be put to# ber 31 when the machine is at rest without P imposing an wear whatever to the relatively mova le parts, thus relieving the shaft 5 of the wear which'would otherwise be .imposed b said loose clutch member. 'Bein remova le, this bearing sleeve, which is su jected to the greater wear of the relatively rotating Y arts, may be readily renewed and the li e of the wearing parts thus greatly increased at a ve slight expense.

Havin thus set forth t e invention, what 1. An electrical driving device comprisin a motor-frame, a driving -shaft journal therein, a driving element mountedI upon said shaft and inclosed within the motorfranie, a driving friction-clutch member having a hub splined upon and extending beyond and inclosing the end of said shaft upon which it is endwise movable, a beari sleeve carried by said motor-frame and a fording an internal bearing for the driving shaft Vadjacent said clutch member and a concentric external bearing, a driven clutch member rovided with .a pulley-wheel and having al ub loosely fitted upon the external bearing of said sleeve, a fixed fulcrum c arried by said motor-frame, and an operat lever mounted u on said fixed fulcrum an adapted to axia engage the hub of said driving latterinto operative engagement with the friction c utch member to thrust the driven clutch member.

drivin friction-clutch member having a hub Y spline upon andA extending beyond and in'- c osin the end ofs'aid shaft upon which it is en wise movable, a removable bearin sleeve mounted in said motor-frame and a fording an internal bearing for the driving shaft adjacent said clutch member and a concentric external bearing, a driven clutch member provided with a pulley-wheel and having a bearing of said sleeve, a fixed fulcrum c arried by said motor-frame, and an operatin latter into operative engagement with thel driven clutch member.

3. AnV electrical driving device comprising a motor-frame,r a driving shaft journale ub loosely fitted upon the external io lever mounted lu on said fixed fulcrum an I therein, a driving element mounted u n said shaft and inclosed within the motorame, a drivin friction-clutch member having a hub s line upon and extending beyond and ine osing the end of said shaft upon which it is endwise movable, a removable bearin sleeve mounted in sa'id motor-frame and a Ordin aninternal bearing for the driving shaft a jacent said clutch member and a concentric external bearin a driven clutch member providedv with a cy mdrical braking portion and with a pulley-wheel and having a hub loosely fitted upon the external bearing of sai sleeve, a fixed fulcrum carried by said motordizo frame, a two-armed anglelever mounted at the junction of its arms upon said fixed ful-l I crum andI having its arms disposed in substantially the plane of said shaft and one o f said arms adapted to engadge the hub of the driving clutch member an to thrust the latter into operative relation` vwith the driven clutch member, and abrakeshoe carried by the other arm of said lever and adapted to operatively engage the annular braking por# tion of the driven clutch member when the first-named arm is retracted. v

4. A11 electrical driving device comprising a motor-frame, a driving shaft journaled' therein, a driving element mounted upon said shaft and inclosed Within the motor-frame, a drivin friction-clutch member having a hub spline upon and extending beyond and inclosing the end of said shaft upon which it is endwise movable, a removable bearin sleeve mounted in said motor-frame and aording an internal bearing for the driving shaft ad jacent said -clutch member and a concentric external bearing, a driven clutch member provided With a cylindrical braking portion and -With a pulley-Wheel and having a hub loosely fitted upon the external bearing of said sleeve, a fixed fulcrum carried lby said'motorframe, a two-armed angle-lever mounted at the junction of its arms upon said fixed fulcrumV and having its' arms disposed in substantially the plane of said shaft and one of said arms adapted to engage the'hub of the driving clutch member and to thrust the latter into operative relation With the driven clutch member, and abrake-shoe of yielding material removably mounted upon and carried by the other arm oi'- said lever and adapted to operatively engage the annular braking portion of the driven clutch member when the first-named arm is retracted.

In testimony whereof, 'I have signed my name to this specification, in the presence of two subscribing witnesses. i

\ GUSTAVE o. MARX.

Witnesses: HENRY J. MILLER, H. A.y KORNEMANN.' 

